Since I think Luffy and Akainu will fight eventually, Luffy would need something to counter Akainu's magma. I'm thinking of two possibilities: armament haki improvement or....plasma
Now what I mean by armament haki improvement is that he harden's his body to a certain degree that attains a high durability of that of metals that can withstand magma like iron which would greatly help Luffy in fighting the Akainu.
Now the plasma thing, I do believe it's possible to achieve such a state well not to an extent as a giant sun, but to smaller degree.
The way you create plasma is if you take gas and add enough thermal energy it'll drive electrons off the gas atoms and ionize and those atoms become plasma. So the steam that Luffy gives off in gear second can be used as that gas and since his body
is really hot when in gear second, it traps heat inside the body so that heat can be used as the thermal
energy needed to ionize the gas atoms in the steam to create plasma.
I hope that makes sense lol
Now what I mean by armament haki improvement is that he harden's his body to a certain degree that attains a high durability of that of metals that can withstand magma like iron which would greatly help Luffy in fighting the Akainu.
Now the plasma thing, I do believe it's possible to achieve such a state well not to an extent as a giant sun, but to smaller degree.
The way you create plasma is if you take gas and add enough thermal energy it'll drive electrons off the gas atoms and ionize and those atoms become plasma. So the steam that Luffy gives off in gear second can be used as that gas and since his body
is really hot when in gear second, it traps heat inside the body so that heat can be used as the thermal
energy needed to ionize the gas atoms in the steam to create plasma.
I hope that makes sense lol